Low-pressure gas lighting and extinguishing apparatus.



A. NIARKE.

LOW PRESSURE GAS LIGHTING AND EXTINGUISHING APPARATUS. APPLICATION FILED SEPT.27. 1916.

1 ,25 6, 7 1 2. Patented Feb. 19, 1918.

0mm -uf ATTORNEY AAGE MARKE, OF CHABLOTTENBURG, GERMANY,

LOW-PRESSURE GAS LIGHTING AND EXTINGUISHING- APPARATUS.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed. September 27, 1916. Serial No. 122,440.

To all whom it may concern:

Be it known that I, AAGE MARKE, a subject of the King of Denmark, residing at 36 Kaiser-in Augusta Allee, Charlottenburg, in the Empire of Germany, have invent-ed new and useful Improvements in Low-Pressure Gas Lighting and Extinguishing Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to automatic gaslighting and extinguishing apparatus having a diaphragm for actuating a valve to admit or prevent the access of gas to a burner.

All diaphragms consisting of flat metallic sheets have self tensions, which, in the first instance, counteract the gas pressure and then cause jumping movements of the sheets, when the pressure is increased or decreased. The said uncontrollable movement of the metallic diaphragms are very disadvantageous, because they act upon the controlling mechanism of the gas valve and cause undesirable strokes of the valve. The subject of the present invention, therefore, isto avoid the said disadvantages and to construct a diaphragm in which the self tensions are dispensed with.

The subject matter of the present invention consists in dividing the metallic sheets, of which the diaphragm is composed, by means of interpolated faces, lying in the direction of the stroke of the diaphragm, into a plurality of elastic plane annular faces, which, on account of their small breadth, are not subjected to uncontrollable deformations. The annular faces have been given a previous tension having the same direction as the tension produced by the deflection or stroke of the diaphragm, by manufacturing same in such a way that their radial lines form acute angles with a plane standing vertically to the direction of the stroke of the diaphragm, so that the annular faces cannot move as far backward as to reach the neutral elastic zone or to jump across the same.

In order to obtain a larger stroke of the diaphragm, and to reduce the number of depending sheets in case they form a bellowsshaped diaphragm, the annular faces of the sheets are arranged steplike in such a way that the distance between the inner walls of two adjoining sheets (forming a gas filled bellows) decreases toward the center of the diaphragm.

During the first part of the stroke of the new diaphragm, the central annular face of each sheet, first of all, approaches the plane of the outer annular face, and as a result,

after a part of the stroke, the sheets are in a position in which the known sheets are at rest. Therefore, for the extent of this first part of deflection, the stroke of the new diaphragm is larger than that of the diaphragms heretofore used.

For neutralizing the influence of the high differences of temperatures acting upon the diaphragm, a thermostat is intercalated between same and the controlling mechanism.

In the accompanying drawing, Figure 1 is a side view of the new gas lighting and extinguishing apparatus partly in section; Fig. 2 is an enlarged sectional view of the diaphragm, and Fig. 3 shows a detail view of a ball joint connecting the thermostat with the controlling mechanism.

The gas lighting and extinguishing apparatus has a casing 5, with a cover 4: by which a metallic diaphragm is clamped to the casing carrying the gas valve controlling mechanism not shown in the drawing. The metallic diaphragm consists of sheets 1, 2 and 3 which are connected with one another as to form a bellows, open to the gas chamber of the casing and being closed toward the cover side of the same. The sheet 1 of the bellows carries, at its center, a cup 12. A spring 15, arranged in the cover 4, abuts the cup 12 and is intended to act upon the diaphragm in a direction opposite to that of the pressure of the gas touching the inner walls of the diaphragm, which are in open connection with the gas chamber. The cup 12 carries a bridge plate, 8, having a socket, 8", in which a sleeve, 6, is loosely guided. The said sleeve carries a spindle 7 extending through the gas chamber and being connected, by an enlarged head, 7, thereon, with a valve controlling means, not shown.

Each of the sheets 1, 2, 3 is provided with depending electric fiat annular faces 1, 2, 3 and 1, 2", 3", arrangedconcentrically and steplike. Between the said annular faces unelastic faces lying in the direction of the stroke of the diaphragm are interpolated. The disks, 1, 2 and 3 are economically manufactured by pressing same in such a Way that the radial lines of the annular faces form acute angles with a plane standing vertically to the direction of the stroke of the diaphragm; therefore, such faces have a previous tension tending toward the cover side of the casing so that the annular faces cannot move so far toward the gas chamber that they reach the neutral elastic zone or jump across the same.

The annular faces of the disks 1, 2 and 3, are furthermore arranged in such a way that the distance between the inner walls of two adjoining sheets, forming a gas bellows, de creases toward the center.

In order to neutralize the influence of the differences of temperature acting on the diaphragm, a thermostat, 9, is provided and is shown as consisting of two curved plates 9 9" of different metal. The said plates are pivoted to ears, 8, of the bridge plate 8 by means of a pivot pin, 10, and a hinged layer 11, in order to enable the said plates to be slightly moved.

The spindle 7 is threaded and screwed into the sleeve 6, provided with a flange 6 having a ball shaped surface 6". The said surface is in contact with a socket or annular bearing arranged on the thermostat, and a spring, 13, carried by the sleeve, 6, is intended to secure a proper contact of the ball bearing. On the thermostat, fingers, 9', are provided which mesh. with notches, 6, on the flange 6 and prevent the sleeve, 6, from being rotated.

In case, however, that the thermostat is influenced by changes of temperature, it will bend itself in a direction opposite to that of the diaphragm, so that the spindle 7 remains in its position.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a low pressure gas lighting and extinguishing apparatus, the combination of a casing, valves therein, a metallic diaphragm in the casing, and a controlling mechanism for actuating the valves, said diaphragm consisting of sheets which are div-idedthrough; unelastic faces lying in the direction of the stroke of the diaphragm into a plurality of elastic annular ifaces which. are laid in such a direction that their radial .lines form acute angles with a plane vertical to the direction of the stroke of the diaphragm.

v 2..In a low pressure gas lighting and extinguishing apparatus, the combination with a casing; containing valves and .a .metallic diaphragm. actuating the valves. through. 1 a

controlling mechanism, the diaphragm consisting of'sheetswhich are divided through unelastic faces lying in the direction of the stroke of .the diaphragm into a plurality of elastic annular faces which are laid in such a direction that their radial lines form acute angles with a plane vertical to the direction of the stroke of the diaphragm, such sheets being arranged in a way that the distance between the inner walls of two adjoining sheets decreases toward the center.

3. In a low pressure gas lighting and extinguishing apparatus, the combination with a casing containing valves and a metallic diaphragm actuating the valves through a controlling mechanism, the diaphragm consisting of sheets which are divided through unelastic faces lying in the direction of the stroke of the diaphragm into a plurality of elastic annular faces which faces are laid in such a direction that. their radial lines form acute angles with a plane vertical to the direction of the stroke of the diaphragm, such sheets being arranged in a Way that the distance between the inner walls of two adjoining sheets decreases toward the center, and of a thermostat being intercalated between the diaphragm and the controllingmechanism.

4. In a low pressure gas lighting andextinguishing apparatus, the combination with a casing containing valves and a metallic diaphragmactuating the valves through a controlling mechanism, the diaphragm consisting of sheets which are divided through unelastic faces lying in the direction of the stroke of the diaphragm into a plurality of elastic annular faces which are laid in such a direction that their radial lines form acute angles with a plane vertical to the direction of the stroke of the diaphragm, such sheets being arranged in a way that the distance between the innerwalls of two adjoining sheets decreases toward the center, of a thermostat being intercalated between the diaphragm and the controlling means, of a sleeve adapted to guide the controlling means, of 'a ball surface arranged on said sleeve and of a spring adapted to hold the said ball surface in contact with the thermo stat.

In testimony whereof, I havesigned my name to this specification in the presence of two subscribing witnesses.

AAGE MARKE.

Witnesses:

ALrREI) ROT HENRY HASPER,

five cents each. by addressing the Commissioner of Eatents;

Washington, D. 0." i 

